Table of Contents
Sequential Logic
What We Need:
What We Need:
Let’s Use This D flip-flop
Registers
Example - Circuit with Feedback
Examples (cont’d)
Example - Circuit without Feedback
Timing Methodologies (cont’d)
Typical timing specifications
Cascaded Flip-Flops
Flip-flop Extras
Registers
Shift register
4-bit Universal shift register
Design of Universal Shift Register
Binary counter
Example: 4-bit binary synchronous counter
Other Counters: cheaper/faster
Cascaded Flip-Flops (cont’d)
Effect of Clock Skew
Clock Skew
Other Types of Latches and Flip-Flops
Comparison of latches and flip-flops
What About External Inputs?
Synchronization failure
Calculating probability of failure
Metastability
Guarding against synchronization failure
Another Problem with Asynchronous inputs
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